Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Planyway - Visual project management for Jira and Trello: manage resources, build project roadmaps, use time tracking.
Video Live Chat for Websites - Provide real-time video chat support with screen sharing
Corrello - Dashboards for agile teams using Trello